肖 鵬, 黃啟忠, 易茂中
(中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室, 長沙 410083)
摘 要: 為了改善航空剎車副用炭/炭復(fù)合材料的摩擦磨損性能， 對二維編制C/C復(fù)合材料的摩擦機(jī)理進(jìn)行了深入的研究； 對比了試樣滲Si后及滲Si前的實(shí)驗(yàn)結(jié)果， 著重研究了試樣不同的滲Si量對摩擦磨損行為及特性的影響。結(jié)果發(fā)現(xiàn)滲Si的試樣比沒有滲Si試樣摩擦曲線線型好， 并且摩擦試驗(yàn)過程中的振動(dòng)現(xiàn)象也得到了解決。但摩擦因數(shù)隨著所生成SiC含量的增加， 由0.35→0.32→0.28呈下降趨勢； 磨損量隨著所生成SiC含量的增加而增大； 當(dāng)有大量的不均勻的SiC顆粒生成時(shí)， C/C復(fù)合材料的摩擦表面將會(huì)被剝落, 并從材料的微觀性能及摩擦機(jī)理方面給予了深入的分析。
關(guān)鍵字: 炭/炭復(fù)合材料；熔融滲Si； 摩擦磨損機(jī)理； 二維編制
HUANG Bai-yun, XIAO Peng, HUANG Qi-zhong,
YI Mao-zhong
（State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:In order to improve the friction-wear properties of the C/C composites for aircraft brake pairs, the friction mechanism of two dimension C/C composites was studied deeply. The influence of the different Si smearing thickness on friction properties was investigated. Results show that samples of infiltrating Si are improved in comparasion with no infiltrating Si, such as friction curve, vibration. But the friction coefficient reduces from 0.35 to 0.28 with the increasing of SiC content, the wear increases with the increasing of SiC content. Friction surface of C/C composites has obvious nick, when a lot of SiC is produced. The results is analyzed deeply by C/C composites micro-properties and friction mechanism.
Key words: C/C composite; molting infiltrating Si; friction mechanism; two dimension weaving
